<template>
    <div>
        <h1>当前求和为：{{sum}}</h1>
        <h3>当前求和放大10倍为：{{bigSum}}</h3>
        <h3>我在{{school}}学习{{subject}}</h3>
        <h3 style="color: red">Person 组件的总人数：{{personList.length}}</h3>
        <select v-model.number="n">
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
        </select>
        <button @click="increment(n)">+</button>
        <button @click="decrement(n)">-</button>
        <button @click="incrementOdd(n)">当前求和为奇数再加</button>
        <button @click="incrementWait(n)">等一等再加</button>
    </div>
</template>

<script>
    import {mapState, mapGetters, mapMutations, mapActions} from 'vuex'

    export default {
        name: "Count",
        data() {
            return {
                n: 1
            }
        },
        methods: {
            // 借助 mapMutations 生成对应的方法，方法中会调用 commit 去联系 mutations
            ...mapMutations('countAbout', {increment:'JIA', decrement:'JIAN'}),
            // 借助 mapActions 生成对应的方法，方法中会调用 dispatch 去联系 actions
            ...mapActions('countAbout', {incrementOdd:'addOdd', incrementWait:'addWait'})
        },
        computed: {
            // 借助 mapState 生成计算属性，从 state 中读取数据（对象写法）
            ...mapState('countAbout', {sum:'sum', school:'school', subject:'subject'}),
            ...mapState('personAbout', {personList:'personList'}),
            // 借助 mapGetters 生成计算属性，从 getters 中读取数据（数组写法）
            ...mapGetters('countAbout', ['bigSum'])
        },
        mounted() {
            const x = mapState({he:'sum', xuexiao:'school', xueke:'subject'});
            console.log(x);
        }
    }
</script>

<style>
    button {
        margin-left: 5px;
    }
</style>